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Open-Access Journal
Opinion Review
Mustafa Altay 
World J Gastroenterol 25(22):2699-2705. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2699
Review
Giovanni Bruno, Piera Zaccari, Giulia Rocco, Giulia Scalese, Cristina Panetta, Barbara Porowska, Stefano Pontone, Carola Severi 
World J Gastroenterol 25(22):2706-2719. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2706
Eiji Sakai, Ken Ohata, Atsushi Nakajima, Nobuyuki Matsuhashi 
World J Gastroenterol 25(22):2720-2733. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2720
Minireviews
Claire Durkin, Somashekar G Krishna 
World J Gastroenterol 25(22):2734-2742. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2734
Basic Study
Shun-Zhen Zheng, Ping Sun, Jian-Ping Wang, Yong Liu, Wei Gong, Jun Liu 
World J Gastroenterol 25(22):2752-2762. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2752
Rui Zhang, Si-Ping Ma, Tao Lin, Yan-Xi Li, Shi-Hua Yang, Wan-Chuan Zhang, Yong-Peng Wang, Zhe-Xian Liu, Ji-Bin Li 
World J Gastroenterol 25(22):2776-2787. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2776
Retrospective Study
You-Jung Choi, Eue-Keun Choi, Kyung-Do Han, Jiesuck Park, Inki Moon, Euijae Lee, Won-Seok Choe, So-Ryoung Lee, Myung-Jin Cha, Woo-Hyun Lim, Seil Oh 
World J Gastroenterol 25(22):2788-2798. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2788
Clinical Trials Study
Xin-Wei Mu, Xiang Wang, Wen-Xiu Chen, Wen-Hao Zhang, Jia-Kui Sun 
World J Gastroenterol 25(22):2799-2808. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2799
Systematic Reviews
Marilena Durazzo, Giulia Lupi, Michela Scandella, Arianna Ferro, Gabriella Gruden 
World J Gastroenterol 25(22):2809-2818. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2809
Meta-Analysis
Shan-Ping Ye, Hua Qiu, Shi-Jun Liao, Jun-Hua Ai, Jun Shi 
World J Gastroenterol 25(22):2819-2832. Published online Jun 14, 2019. doi: 10.3748/wjg.v25.i22.2819
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